Authentic Meiji period, c.1900 original Japanese erotic art shunga woodblock print picture by Takeuchi Keishu (1861-1942).  Shunga picture measures 18.9 cm x 12.8 cm.  Great colors and impressions!  Decent+ condition with some wear, red dye bleeding (due to the red inks used), and soiling.  No backing.  Please refer to photos.
 
A great shunga piece detailing the differences between the 'ideal-looking' vagina at the upper left to the inferior ones on the right.  Each picture is even denoted a name (kanji in red column) specifying its type, while an actual poem is written below the 'perfect one.'